System for running incompatible graphics programs

Details System for running incompatible graphics programs System for running incompatible graphics programs

1993-10-08

1995-05-02

Kriess, Kevin A.

Boots, shoes, and leggings

3642323, 3642372, 3642643, 364DIG1, 364247, G06F 9455

Patent

active

054128005

ABSTRACT:
A method and apparatus for executing any one of a plurality of computer programs for operation of a single output device in a computer system through the control of parameters loaded in registers in the system, the computer system having program compatibility requirements for programs to be executed, includes commencing execution of each of the programs as if it were compatible with said system program compatibility requirements, and modifying the results of any attempts by the program being executed to directly load the register parameters controlling the output device if the loading attempts are non-compatible with the system program compatibility requirements, the modification making the results of the loading attempts system compatible.

REFERENCES:
patent: 4825358 (1989-04-01), Letwin
patent: 4872054 (1989-10-01), Gray et al.
patent: 4890219 (1989-12-01), Heath et al.
patent: 4958378 (1990-09-01), Bell
patent: 4977398 (1990-12-01), Pleva et al.
patent: 5088033 (1992-02-01), Binkley et al.

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